Journal
JOURNAL OF SEPARATION SCIENCE
Volume 33, Issue 12, Pages 1842-1848Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201000080
Keywords
HPLC-ESI-MS/MS; Temperature-controlled ionic liquid dispersive liquid-phase microextraction; Triclocarban; Triclosan
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Funding
- Scientific and Technological Developing Project of Shandong Province [2009GG20001021-9]
- Research Encouragement Foundation of Excellent Midlift-Youth Scientists of Shandong Province [2006BS08013]
- Analysis and Test Center
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A novel dispersive liquid-phase microextraction method without dispersive solvents has been developed for the enrichment and sensitive determination of triclosan and triclocarban in environmental water samples prior to HPLC-ESI-MS/MS. This method used only green solvent 1-hexyl-3-methylimidazolium hexafluorophosphate as extraction solvent and overcame the demerits of the use of toxic solvents and the instability of the suspending drop in single drop liquid-phase microextraction. Important factors that may influence the enrichment efficiencies, such as volume of ionic liquid, pH of solutions, extraction time, centrifuging time and temperature, were systematically investigated and optimized. Under optimum conditions, linearity of the method was observed in the range of 0.1-20 mu g/L for triclocarban and 0.5-100 mu g/L for triclosan, respectively, with adequate correlation coefficients (R>0.9990). The proposed method has been found to have excellent detection sensitivity with LODs of 0.04 and 0.3 mu g/L, and precisions of 4.7 and 6.0% (RSDs, n = 5) for tridocarban and triclosan, respectively. This method has been successfully applied to analyze real water samples and satisfactory results were achieved.
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